Cholesterol- and lipoid-lowering therapeutical agent

ABSTRACT

Bis-(p-chlorophenoxy)-acetyl-urea, a compound prepared by reacting sodium salt of urea with a C1 4 alkyl bis-(pchlorophenoxy)-acetate, has excellent therapeutical activities and can be used first of all as cholesterol- and lipoid-lowering agent. This compound may be administered in a daily dose of 25 to 250 mg. for adults.

United States Patent [191 Mikite et al.

[73] Assignee: EGYT Gyogyszervegyeszeti Gyar,

Budapest, Hungary [22] Filed: Nov. 15, 1971 [21] Appl. No.: 198,976

[30] Foreign Application Priority Data Nov. 18, 1970 Hungary EE i864 [52] US. Cl. 424/322 [51] Int. Cl A6lk 27/00 [58] Field of Search 424/322 Apr. 23, 1974 [56] References Cited UNITED STATES PATENTS 3,245,878 4/1966 Berger et a1. 424/322 OTHER PUBLICATIONS Bull. Soc. Chim. France (1964), 383-387.

Primary Examiner--Albert T. Meyers Assistant Examiner-Frederick E. Waddell Attorney, Agent, or Firm-Young & Thompson [57] ABSTRACT Bis-[p-chlorophenoxy]-acetyl-urea, a compound prepared by reacting sodium salt of urea with a C, alkyl bis-[p-chlorophenoxyl-acetate, has excellent therapeutical activities and can be used first of all as cholesteroland lipoid-lowering agent. This compound may be administered in a daily dose of 25 to 250 mg. for adults.

1 Claim, No Drawings CHOLESTEROL- AND LIPOlD-LOWERING THERAPEUTICAL AGENT This invention relates to a process for the preparation Statistically lignificant change! /p 0.05].

results can be achieved e.g. by using a 50 percent mineral oil dispersion of sodium hydride.

Thereafter the thus-obtained sodium salt of urea is reacted with an alkyl bis-lp-chlorop'henoxyl-acetate at -lC. The corresponding urea-derivative can be isolated from the reaction mixture with a yield of 85 to 90 /calculated on the ester-derivativel. The use of the ester-derivative for the preparation of bis-Ipchlorophenoxyl-acetyl-urea results in several advantages, namely a. the starting compounds can easily be prepared with high yields.

b. the preparation of acid chloride may be omitted,

c. the end-productcan be prepared in higher yields. A1k ss/p anar?) saaaiyuoaaesy used as starting substance, may be prepared according to known methods /e.g. Berichte 27, 1894 p. 2795; Hungarian of bis-[p-chlorophenoxyl-acetyl-urea. 5 Patent Specification No. 156,082]. It is to be men- Up to now, this compound has been synthetized by tioned that the reaction of alkyl-bis-lp-chlorophenoxy/- atwo-step process starting from bis-lp-chlorophenoxylacetates with sodium salt of urea has never been deacetic acid. According to this process, in the first step scribed in the literature. h M the acid is converted to bis-lp-chlorophenoxy/-acety1 A di to our examinations, 1 chloride in the presence of excessive amount of thionyl h er Lur a has valuable pharmacological chloride. The CXCCSS 0f thionyl chloride is evaporated properties; especially the action exerted on the and the obtained acid chloride is reacted with urea in metabolism and on the liver is of importance. chloroform to give bis-lp-chlorophenoxyl-acetylre Among the effects exerted on lipid metabolism, the in a yield of 50 lBull. soc. chim. France 1964, 383/. hypolypaemic effect is the most important one. Ac- This compound has been referred to as a pesticide cording to our investigations, after adiministering bisagent. The above mentioned process has, however, sevlp-chlorophenoxyl-acetyl-urea to normolipaemic rats eral disadvantages. Namely, preparation of the acid for a few days, a significant decrease of the serum chochloride is difficult /the excess of thionyl chloride can lesterol and triglyceride level can be observed. In this only be removed by repeated distillations, during which respect, the compound prepared according to the ina part of the acid chloride decomposes], and the second vention is far more active than Clofibrate [2-l4-chlorostep of the process can only be carried out with a low phenoxyl-isobutyric acid ethyl ester]. p I y In order to compare the cholesteroland triglyceride- Now we have found that the above compound can be l i ff t f bis-lp-chlorophenoxy/acetyl-urea prepared fa mo fav r y y reading C1-4 and of Clofibrate, tests were carried out on male rats. a yl- -lph p fln yl-a ta With t Sodium The compounds to be tested were administered orally salt of urea. The sodium salt of urea can be prepared to a group of animals during 10 days, and the serum y dissolving y urea in an inert Solvent and adding cholesterol and serum triglyceride level was deterequimolar amount of sodium hydride to the solutionat mined. The results are summarized in Table l. The exa temperature below 0C. Sodium hydride may be used periments were carried out on groups consisting of 10 in pure state or in the form of itsdispersion; satisfactory animals. v 0

Table 1.

Denis Scrum-chole- Serum-tri- Alteration Compound sterol glyceride mg/kg mg% i s.e. mg; s.e. choletristerol glyceride Control l77.2:6.9 98.0:132 CAU 3.0 l78.61-8.6 48.2: 7.72 +0.8 s0 .sdo. 100. 135314.83 32.2: 4.59 -23.o' -o1.0-. do. 30.0 109.3:300 27.62: 3.l6 -3a.2* 71.sdo. 100.0 93.514.28 27.9: 2.32 47.2* -71.s*

Control 157.5142 67.3: 4.47 Clofibrate 30.0 145012.25 0391-391 -7.9' s.0

do. 100.0 142.213.16 42.1: 2.39 -9.7- 37.4* do. 3000 l30.0;t5.47 42.2: 4.83 -17.4- 37.4*

Remark: The determination of cholesterol was carried out by the method of Zlatkis et :al. /J.Lab.Clin. Med.

.41, 486, 1953/. and that of the triglycerides by the method of E. Van Handel and D. B. Zilversmit [J .Lab.- .C i ..-,M2-. .Qt.l521 1257/1 CAU b-lp-chlorophenoxyl-acetyl-urea The cholesterol and trigylceride lowering effect of the compound manifests-in experimental hyperlipaemia also in small doses. The effect of the compound on the Table 2.

Dosis Serum-chole- Serum-tri- Percent change Compound sterol glycerides mg/kg mg% 1 s.e. mg% 1 s.e. choletristcrol glycerides Control 320.5114.4 1403.3198.7 CAU 10.0 298.8112.l 882.1163.2 6.7 -37.l*

Control 36401152 1842011334 Clofibrate 100.0 378.31l7.7 2051.01143.5 +m3.9 +11.3

Statistic ally significant changes /p 0.05/.

Remark: After days of oral pre-treatment with the Table 4.

compound to be tested, standard doses [200 mg/kg i.v.] of Triton WR-1339 were administered into each Dosis Liver weight Liver weight of the rats. Determinations were performed 6 hours mg/kg 3,100 g 332 weigh change after administration of Triton. Methods of the determinations: see Table 1. The tests were carried out on Cvmml 394101197 groups consisting of 10 animals. CAU 3:8 12:82:? i g 'gg, The inhibition of the biosynthesis of cholesterol plays 30.0 5.3910110 36.80 an important role in the lipidlowering effect of bis-lp- 692x032) chlorophenoxyl-acetyl-rea. This compound inhibits the Comm] 5:040 incorporation of C"-acetate into the free cholesterol Clofibraw 100 41171010 119 fraction both in the liver and in the serum. As it turns 38:8 gain? 3 8 out from the data on Table 3, bis-lp-chlorophenoxyl- 300.0 6.211016 +4950" acetate-urea is more active than Clofibrate also in this Statisticall si n'ficant ch'n s/ 0.05]. respect. m y g A p Table 3.

Dosis Serum specific activity Compound DPM/mg cholesterol1s.e. Percent change Serum Liver Serum Liver Control 3809-608 383415439 CAU 30.0 19021265 136811280 50.l -74.30' Clofibrate 300.0 30491356 247113560 20.0' 35.60*

Statistically significant changes /p 0.05/.

Remark: Investigations were carried out on male rats orally pre-treated with the compound to be tested. The compound was administered for ten days, thereafter a 50 y. Ci dose of C-acetate was injected i.p. The determinations were performed 2 hours after injection. The purification of cholesterol was carried out according to Folch et al. /.l.Biol.Chem. 266, 947, 1957/. Tests were carried out on groups consisting of 5 rats.

Remark: These results are obtained by p.o. treatment of male rats for ten days.

The hepatomegalic effect of the compound is accompanied neither by pathological changes of liver function /BSP, SGOT, and SGPTI, nor by histopathological changes referring to damage of liver. The liverprotecting effect of the compound is proved by the ob servation that the narcotic effect of hexobarbital in rats An additional valuable property of bis-lpchlorophenoxyl-acetyl-urea is that it increases the mass of liver parenchyma. Due to this effect, both the number and the volume of liver cells increase.

This effect of bis-lp-chlorophenoxyl-acetyhurea ap:

pears in much smaller doses than in case of Clofibrate treatment. The data referring to the hepatomegalic effect of bis-lp-chlorophenoxyl-acetyl-urea and of Clofibrate are listed in Table 4.

and rats is very low; LD values are more favourable in bothspecies of animals than those obtained in the case of Clofibrate.

Remark: The LD values relate to the results obtained on the 7" day of treatment. Evaluation has been carriedput using the probitanalysis according to Litchfield-Wilcoxon.

Bis-lp-chlorophenoxy/-acetyl-urea can be administered orally in the form of tablets, powders, capsules, syrups, granulates and solutions. The compositions may contain pharmaceutically acceptable organic and inorganic auxiliary substances, such as granulating additives, excipients, lubricants, wetting agents and antioxidants, further colouring, flavouring and sweetening agents, etc. In the tabletting process, granulating additives, such as calcium carbonate, lactose and talc, disintegrating agents, such as starch, binding materials, such as gelatine and tragacanth and lubricants, such as magnesium stearate and stearic acid rla be used In the preparation of suspensions, insert suspending agents, such as methylcellulose and tragacanth, and wetting agents, such as lecithin may generally be used. The capsules may contain the active ingredient as such, or in admixture with an inert solid vehicle, such as calcium carbonate.

The daily dose of bis-lp-chlorophenoxyl-acetyl urea varies between and 250 mg., it is advisable, however, to add the active agent in smaller doses /e.g. in a dose of 50 to 100 mg./ 2 to 4 times a day. The active agent may also be administered in the form of a susrained-release composition.

The granulates, tablets, coated tablets can be prepared and used in the form of sustained-releasecompositions. Using such compositions it can be ensured that the disintegration of the composition and the absorption of the active agent takes place in the most preferred part of the organism -i.e. in the gastrointestinal tract and/or that the absorption of the active agent takes in gradually.

Capsules may contain the active ingredient as such or in admixture with an inert, solid vehicle. Th active ingredient may be present in the capsules in granulated form, as well.

The process according to the invention is further elucidated by the aid of the following non-limiting Examples.

EXAMPLE 1 A solution of 6.0 /0.1 mole/ of dry urea in 100 ml. of abs. dimethyl formamide is cooled to 10C and 4.8 g.

g [0.1 mole/ of sodium hydride is added in the form of a dried over magnesium sulfate and the solvent is evaporated in vacuo. The residue is recrystallised from ethanol. 12.70 g. of bis-lp-chlorophenoxy/-acety1 urea are obtained, m.p. l31-133C.

Cl N

Analysis: C H

Calculated 50.78 3.40 19.96 7.90

Found 50.95 3.69 119.76 7.78

EXAMPLE 2 mg. 50 mg. Active ingredient 0.1000 g. 0.0500 g.

-Continued Lactose 0.0600 g. 0.0600 g. Potatoe starch 0.0280 g. 0.0210 g. Gelatine 0.0040 g. 0.0030 g. Talc 0.0060 g. 0.0045 g. Magnesium stearate 0.0020 g. 0.0015 g.

EXAMPLE 3 The prescribed amounts of the active ingredient and of lactose are mixed with a 15 percent alcoholic solution of polyvinylpyrrolidone as described in Example 2. The obtained mass is granulated through an acid-proof sieve of about 0.9 mm. mesh, the granules are dried and repeatedly granulated through a sieve of 0.9 mm. gaps. The obtained granules are filled in capsules. Formulation:

100 mg. 50 mg. Active ingredient 0.1000 g. 0.0500 g. Lactose 0.0940 g. 0.1440 g. Polyvinylpyrrolidone 0.0060 g. 0.0060 g.

What we claim is:

l. A method of reducing serum cholesterol and serum lipoid levels in adult animals suffering from hyperlipemia, comprising administering orally to said animals 25 to 250 milligrams per day of bis-(pchlorophenoxy)-acetyl-urea.

* =1 at a: 

